element call

modules/common/livekit.nix

@@ -1,6 +0,0 @@
-{config, ...}: {
-  services.livekit = {
-    enable = true;
-    keyFile = config.age.secrets."livekitKeys.age".path;
-  };
-}

modules/common/services/livekit.nix

@@ -6,7 +6,7 @@
 }: let
   cfg = config.services.livekit;
 in {
-  meta.maintainers = with lib.maintainers; [quadradical];
+  meta.maintainers = [lib.maintainers.quadradical];
   options.services.livekit = {
     enable = lib.mkEnableOption "Livekit SFU";
     package = lib.mkPackageOption pkgs "livekit" {};

modules/common/services/lk-jwt-service.nix

@@ -1 +1,85 @@
-{}
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  cfg = config.services.lk-jwt-service;
+in {
+  meta.maintainers = [lib.maintainers.quadradical];
+  options.services.lk-jwt-service = {
+    enable = lib.mkEnableOption "Enable lk-jwt-service";
+    package = lib.mkPackageOption pkgs "lk-jwt-service" {};
+
+    livekit = {
+      url = lib.mkOption {
+        type = lib.types.str;
+        default = "127.0.0.1";
+        description = "The URL that livekit runs on, prefixed with `ws://`.";
+      };
+
+      keyFile = lib.mkOption {
+        type = lib.types.path;
+        description = ''
+          Path to a file showing LiveKit keys, where you must declare some of: `LIVEKIT_KEY`, `LIVEKIT_SECRET`, `LIVEKIT_KEY_FROM_FILE`, `LIVEKIT_SECRET_FROM_FILE`, and/or `LIVEKIT_KEY_FILE`.
+          For more information see <https://github.com/element-hq/lk-jwt-service>.
+        '';
+      };
+    };
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 8080;
+      description = "Port that lk-jwt-service should run on";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.lk-jwt-service = {
+      description = "Minimal service to issue LiveKit JWTs for MatrixRTC";
+      documentation = ["https://github.com/element-hq/lk-jwt-service"];
+      wantedBy = ["multi-user.target"];
+      wants = ["network-online.target"];
+      after = ["network-online.target"];
+      environment.LIVEKIT_URL = cfg.livekit.url;
+
+      serviceConfig = {
+        EnvironmentFile = cfg.livekit.keyFile;
+        DynamicUser = true;
+        User = "lk-jwt-service";
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
+        PrivateUsers = true;
+        RestrictAddressFamilies = [
+          "AF_INET"
+          "AF_INET6"
+        ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        ProtectHome = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = [
+          "@system-service"
+          "~@privileged"
+          "~@resources"
+        ];
+        CapabilityBoundingSet = [
+          "CAP_NET_BIND_SERVICE"
+          "CAP_NET_RAW"
+        ];
+        ExecStart = "${cfg.package}/bin/lk-jwt-service";
+        Restart = "on-failure";
+        RestartSec = 5;
+        UMask = "077";
+      };
+    };
+  };
+}